Drip some ethanol on a hot surface, and you’d expect it to spread into a thin layer and evaporate. But that doesn’t always happen, and a recent study looks at Keep reading
Tag: self-propulsion
Swarm of Surfers
Self-propelled objects can form fascinating patterns. Here, researchers investigate how small plastic “surfers” move on a vibrating fluid. Each surfer is heavier in its stern than its bow. When the Keep reading
Rocket-Like Supercooled Drops
Many droplets can self-propel, often through the Leidenfrost effect and evaporation. But now researchers have observed freezing droplets that self-propel, too. The discovery came when observing the freezing of supercooled Keep reading
Sliding Along
Robust, self-cleaning surfaces are a holy grail for many engineers, but they’re tough to achieve. One necessary ingredient for a self-cleaning surface is the ability to shed water, which is Keep reading
Taking A Turn
Water droplets immersed in a mixture of oil and surfactants will move about, propelled by the Marangoni effect. Surfactant molecules congregate along the interface between the water and oil, but Keep reading
Collective Motion in Grains
Flocks of birds and schools of fish swarm in complicated collective motions, but groups of non-living components can move collectively, too. In this Lutetium Project video, we learn about grains Keep reading
Fizzy Droplets
Leidenfrost drops surf on a layer of their own vapor, created by the high temperature of a nearby surface relative to their boiling point. These Leidenfrost drops can self-propel and Keep reading
An Inverted Leidenfrost Drop
Leidenfrost drops – liquid drops that levitate on a layer of their own vapor over a hot surface – have been all the rage in recent years. We’ve seen how Keep reading
A Groovy Hovercraft
Not long ago, researchers discovered that droplets hovering over a hot grooved surface would self-propel. The extension to this was to investigate a hovercraft on a grooved, porous surface (top Keep reading
Bouncing, Floating, and Jetting
Get inside some of the latest fluid dynamics research with the newest FYFD/JFM video. Here researchers discuss oil jets from citrus fruits, balls that can bounce off water, and self-propelled Keep reading